[AUTO]:[Counter Blast (1)] When this unit is placed on (GC), if you have a vanguard with "Liberator" in its card name, you may pay the cost. If you do, this unit gets [Shield]+5000 for each of your «Gold Paladin» rear-guards until end of that battle.

With this card getting +5000 shield for each Gold Paladin rearguard, a maximum of 30000 shield, I believe that this unit is much better than a Quintet Wall. If you have a full field this unit is better guaranteed to shield your vanguard than a Quintet Wall that may not give you all the shield you need. Plus this unit pays the same cost as a Quintet Wall making it even better.